I have zero idea if we have IE6 clients any more, but according to the
H5BP community IE6 actually did support gzip and only represents 0.1%
of Internet traffic in 2015 (!) anyways.
See: https://github.com/h5bp/server-configs-nginx/issues/125
[ANSIBLE0006] systemctl used in place of systemd module
Also, move the functionality of the changed check to the systemd task,
because it has the ability to simply daemon-reload itself now.
Ansible 2.4 changes the way includes work. Now you have to use "import"
for playbooks and tasks that are static, and "include" for those that
are dynamic (ie, those that use variables, loops, etc).
See: http://docs.ansible.com/ansible/devel/playbooks_reuse_includes.html
Using www-data was a temporary measure while I was waiting for the
official nginx.org packages to be released for Debian 9 and we had
to use Debian's own nginx package.
There are currently no nginx.org builds for Debian 9, so we need to
use the package from Debian's repository. This package provides a
www-data user and group instead of an nginx one.
We can revert some of this after Debian 9 is released and official
builds come from nginx.org (though it might be useful to keep the
main nginx.conf as a template).
I'm surprised this worked all these years actually. Since Ansible
version 1.6 it has been possible to use the version_compare filter
instead of doing math logic on strings.
See: https://docs.ansible.com/ansible/playbooks_tests.html
I realized the other day that due to complex logic in the location
blocks, various WordPress static files like images and stylesheets
didn't get the HTTP Strict Transport Security header set. We need
to include it on each level where we are setting headers, because
nginx overwrites headers if you set them again in a child block.
There was some knowledge floating around that 860 bytes was the
optimal size, I think it was from an Akamai engineer or something,
but the HTML 5 Boilerplate server configs use 256 bytes, and I
actually have HTML content that is less than 860 bytes, so I guess
I could benefit from compressing it. gzip compression is costly
for the compression side, but very quick for the client, so this
is a good thing.
See: https://github.com/h5bp/server-configs-nginx/blob/master/nginx.conf
The variable name is misleading as this really does is install the
certbot client and its dependencies, and we generally want this to
always happen. If a host doesn't want it, they can override it in
their host vars.
Perhaps I should rename this variable to "bootstrap_letsencrypt" or
something so it is more accurate.
The `ConditionFileIsExecutable` goes in the [Unit] section! This
fixes the error:
systemd[1]: [/etc/systemd/system/renew-letsencrypt.service:6] Unknown lvalue 'ConditionFileIsExecutable' in section 'Service'
Used to indicate if a vhost needs PHP configuration or not, like
for a static site. Set in the hosts's nginx_vhosts block. Defaults
to "False" if unset.
This reverts commit 201165cff6.
Turns out this actually breaks initial deployments, because the
cache gets updated in the first task, then you add sources for
nginx and mariadb, but it doesn't update the indexes because the
cache is < 3600 seconds old, so you end up getting the distro's
versions of nginx and mariadb.
When you give Ansible the key id it will check if the key exists
before trying to download and add it. I got the long fingerprint
from `sudo apt-key finger`.
I have added cache_valid_time=3600 for the first task in each
tag that could be possibly running apt-related commands. For ex,
the "nginx" tag is also in the "packages" tag, but sometimes you
run the nginx tag by itself (perhaps repeatadely), so you'd want
to limit the update unless the cache was 1 hour old
I never modify file in the git repo, but the WordPress updater does
updates from the web (for example TwentySixteen theme), and this
always causes the task to fail when I switch WordPress versions.
This reverts commit a38d822fad.
The docs definitely recommend twice a day. From a note on certbot's
installation page:
> if you're setting up a cron or systemd job, we recommend running
> it twice per day (it won't do anything until your certificates
> are due for renewal or revoked, but running it regularly would
> give your site a chance of staying online in case a Let's
> Encrypt-initiated revocation happened for some reason). Please
> select a random minute within the hour for your renewal tasks.
See: https://certbot.eff.org/#ubuntuxenial-nginx
For idempotence we need to run all apt-related tasks, like editing
source files, adding keys, installing packages, etc, when running
the 'packages' tag.
Take an opinionated stance on HTTPS and assume that hosts are using
HTTPS for all vhosts. This can either be via custom TLS cert/key
pairs defined in the host's variables (could even be self-signed
certificates on dev boxes) or via Let's Encrypt.
Hosts can specify use_letsencrypt: 'yes' in their host_vars. For
now this assumes that the certificates already exist (ie, you have
to manually run Let's Encrypt first to register/create the certs).
The creation of the fastcgi cache dir is part of the nginx role and
should be labled as such. In situations where you only run nginx
tasks with `-t nginx` nginx will fail to start due to the missing
cache dir.
Google's preload check application pointed out that there was an
extra semi colon in the HTTP header:
$ hstspreload checkdomain alaninkenya.org
Warning:
1. Syntax warning: Header includes an empty directive or extra semicolon.
The tool can be downloaded here: https://github.com/chromium/hstspreload
Signed-off-by: Alan Orth <alan.orth@gmail.com>
Google's PageSpeed Insights tool pointed out that the Genericons
in WordPress' Jetpack module could be compressed.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
Everything is HTTPS now, whether self-signed or otherwise, so it
doesn't make sense to have a config switch for this.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
It's just deduplication, since it's already obvious that the dict
is for nginx-related vars:
- nginx_domain_name→domain_name
- nginx_domain_aliases→domain_aliases
- nginx_enable_https→enable_https
- nginx_enable_hsts→enable_hsts
Signed-off-by: Alan Orth <alan.orth@gmail.com>
It would be bettwe to set these defaults in the role's defaults, but
we can't because they exist in dicts for each of the host's sites.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
The `enable_https` option in host_vars becomes `nginx_enable_https`
to be more consistent with other nginx options used in host_vars.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
Set `use_snakeoil_cert: 'yes'` in host_vars. This is good for dev
hosts where we don't have real domains or real certs. But everything
should have TLS.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
For now I generated the certs manually, but in the future the play-
book should run the letsencrypt-auto client for us!
Signed-off-by: Alan Orth <alan.orth@gmail.com>
We need to actually check if HSTS was requested before setting the
header in the block handing PHP requests. We check in the main vhost
block, but nginx headers are only inherited if you don't set ANY
headers in child blocks (ie, headers set in parent blocks are cleared
if you set any new ones in the child).
Signed-off-by: Alan Orth <alan.orth@gmail.com>
This is really a per-site setting, so it doesn't make sense to have
a role default. Anyways, HSTS is kinda tricky and potentially dang-
erous, so unless a vhost explicitly sets it to "yes" we shouldn't
enable it.
Note: also switch from using a boolean to using a string; it is st-
ill declarative, but at least now I don't have to guess whether it
is being treated as a bool or not.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
For security and predictability clients should only get a reponse
if they request a hostname we are actually hosting.
If TLS is in use then this will use a self-signed snakeoil cert for
an HTTPS-enabled blank, default vhost.
Signed-off-by: Alan Orth <alan.orth@gmail.com>
